There is no need to include zathura.h anymore.

document.h

@@ -7,7 +7,6 @@
 #include <girara/types.h>
 
 #include "types.h"
-#include "page.h"
 
 /**
  * Open the document

page.h

@@ -6,7 +6,6 @@
 #include <girara/datastructures.h>
 #include <cairo.h>
 
-#include "document.h"
 #include "types.h"
 
 /**

types.c

@@ -2,6 +2,7 @@
 
 #include <stdlib.h>
 #include <girara/datastructures.h>
+#include <glib.h>
 
 #include "types.h"
 

types.h

@@ -3,7 +3,20 @@
 #ifndef TYPES_H
 #define TYPES_H
 
-#include "zathura.h"
+#include "macros.h"
+
+/**
+ * Document
+ */
+typedef struct zathura_document_s zathura_document_t;
+/**
+ * Page
+ */
+typedef struct zathura_page_s zathura_page_t;
+/**
+ * Zathura
+ */
+typedef struct zathura_s zathura_t;
 
 /**
  * Plugin manager

zathura.h

@@ -7,6 +7,7 @@
 #include <girara/types.h>
 #include <gtk/gtk.h>
 #include "macros.h"
+#include "types.h"
 
 enum { NEXT, PREVIOUS, LEFT, RIGHT, UP, DOWN, BOTTOM, TOP, HIDE, HIGHLIGHT,
   DELETE_LAST_WORD, DELETE_LAST_CHAR, DEFAULT, ERROR, WARNING, NEXT_GROUP,
@@ -17,12 +18,6 @@ enum { NEXT, PREVIOUS, LEFT, RIGHT, UP, DOWN, BOTTOM, TOP, HIDE, HIGHLIGHT,
   FULL_LEFT, FULL_RIGHT, NEXT_CHAR, PREVIOUS_CHAR, DELETE_TO_LINE_START,
   APPEND_FILEPATH, ROTATE_CW, ROTATE_CCW };
 
-/* forward declaration for types from document.h */
-struct zathura_document_s;
-struct zathura_page_s;
-typedef struct zathura_document_s zathura_document_t;
-typedef struct zathura_page_s zathura_page_t;
-
 /* forward declaration for types form database.h */
 typedef struct _ZathuraDatabase zathura_database_t;
 
@@ -30,7 +25,7 @@ typedef struct _ZathuraDatabase zathura_database_t;
 struct render_thread_s;
 typedef struct render_thread_s render_thread_t;
 
-typedef struct zathura_s
+struct zathura_s
 {
   struct
   {
@@ -116,7 +111,7 @@ typedef struct zathura_s
     gchar* file_path; /**< Save file path */
     gchar* password; /**< Save password */
   } file_monitor;
-} zathura_t;
+};
 
 /**
  * Initializes zathura